What contribution has Zhan Tianyou made to China’s railway industry?

On August 11, 1909, the Beijing-Zhangjiakou Railway was finally completed and opened to traffic, two years ahead of schedule. Zhan Tianyou's method saved the country 280,000 taels of silver. The success of the construction of this railway has also won praises from foreigners. Then Zhan Tianyou served as the chief engineer of the Sichuan-Hankong-Guangdong-Sichuan Railway and successfully completed the tasks. Zhan Tianyou made great contributions to China's railway industry.